Stuffing device for concrete finishing machines



@QLZQ 31, 31933 Q I LDW STUFFING DEVICE FOR CONCRETE FINISHING MACHINES Filed NOV. 17, 1928 Patented Oct.31, 1933:

-' UNITED STATES IPATE NT 1 QFFI C'E j 7 I e I e 115133371 7 ST'UFFING DEVICE FOR coNoRETE 'i FINISHING MAcnINEs l Charles L; Low, Ohicago,- 111., assigns. t 'Koehring Company, "Milwaukee, Wis., a'- cor.-

poration vApplication Novemlier '17,l1928 v Serial o. 320 ,-125- @23 Claims. (c1; 94-49) {This invention comprises a noveldevice marily designed for use in the laying of vconcrete roads,: and acting to stuff or press-r workdown' concrete to a co'm-pactbody at the portions ofthe 5 mass immediatelyadjacent to thegroad forms.

The invention is applicable as astuffing or pressingdevice for use with other types offorms,

howeveiq r i p In general, most of the highway departments 210 of the different states require astuifing orpushing down of the aggregatejustinside of the road forms to prevent and reduce to the minimum air voids or incomplete concrete structure at the rcadedges which would be considerably in evidence if this were not done. It has been the customin the past for the puddlers to do this stufiing with their spades-or shovels, and it isobvious that it requires an appreciable amount of labor and time which could be dispensed with-and ex- -were -done automatically. E,

.It is an .object of this invention to providea :means' for automatically producing a stufiing or pushing down of the concrete adjacent-the g9 pended on other phases of th'e'work if this stufling road iormsv ,A Iurther object of the invention isto provide a device which is-quickly and easilysattachable' 44:0 1111 the drawing: 7 Fig. .lis a side elevation. of the stuffing wheel attachment shown "connected to atypical road finishing machine; 7

2: is anenlargedverticalfsectional view .onlinel2- 2 of Fig. 1;. and

Fig. 3' is an enlarged detailed sideielevation of the attachment.

i'Likecharacters refer to like parts in the several figures of the drawing in'whichA denotes acon- 'ventional form of road finishing machine having a prime mover (not shown) mounted'" upon a frame 'a which carries the surface finishing .or-

smoothing 'deyices b I and cand to which the stufiing Wheel attachment B is attached, this particulariorm of finishing machine being weli /diately nextthe road forms. E denotes {the means'employed for causing the 'stufiing wheels tooperate close to the forms, thereby preventing awaytherefrom due to the resistance of theaggregate to theforward motion of the finishing machine.

suitable manner.

[depressions made by the stufling wheels and finish off the-wholesurfa'ce if the roadbed.

known and shown for villustnative purposes only, as I do not wish-to be limited tQa specifiedtype of finishing machineto which the attachmentcis to be applied. Road forms C are shown on which the-finishing machine is adapted totraveliand So at the sametime, saidroadforms define the'side boundaries of the concrete aggregateD along'the sides of the road. v

The stuffing wheels or discs 1 arecrotatably' carried by a bracket arm support 2'removab1y65 attached to the frame of the finishingmachine at 3, said bracket arm support being hinged at 5fby avertical pivot in order to provide forhorizontal swinging movement when encountering cu-rved portions of the roadbedbut prohibiting vertical swinging; Thus the shining wheels are enabled to always'keep clos'e 'to-thei road forms because itis at this fpoi nt that, the so-called stufiing action should take place, namely,limmethe hinged bracket arm support from'sw'inging This is accomplished by using any suitable means :-such as, for. example, an arm 6 .removably attached to the. bracket .arm support 2 as at "7 and rotatably, carrying a guide roller 78 to engage the outerface of the road forms C, ,35 said .roller being retained Ion ithelarm in any In the drawing the stufiing attachment shown connected to the forward. endof the fin- :ishingv machine in order that the preliminary 9o stufiing of the roadbed edges may take place first. ,Subsequently the finishing 'strikeofis or screedsiollow the stuiiing wheels and fill inany v The stuffing Wheels 1 are made from any suitable material suchvas cast iron, cast steel er-the like, and are preferably formed with Ya-beveled ',flange for'icutting edge 9 around the periphery of the' wheels, said cutting edge acting as a pen- 'etrating "means forthe wheels and aiding to keep the aggregate frombeing pushed ,over the top edgesof the road forms as the stuffing wheels advance. One .faceof the stufiing wheels is formed smooth to engage the inner face of the roadformatthe opposite face of the. wheels being providedwith curved ridgesor ribs 10 extending radially from thecenterof the wheels, theends of saidribs terminating iii-enlarged portions or packing terminals 11. The ribs,- incident to the 3 (iii the axle is fixedly held in a bearing14 which is bolted or secured to the bracket arm support 2, the other end of the axle being threaded to receive a nut 15 for keeping the shoulder 16 on the outer face of the stuffing wheel more or less close to the bearing whereby too much play of the wheel on the axle is prevented. However, I,

do not wish to be limited to this type of bearing mounting as any suitable manner of rotatably mounting the stufling wheels might be employed. For example, the stuffing wheels might have integrally formed axles extending therefrom or axles sweated into the wheels,said axles being rotatably carried in the bearings 14. I further do not wish to be limited to the number of stuffing wheels used on each side of the finishing machine, as obviously it would depend'on the consistency of the mix as to the amount of stuffing which would be necessary to eliminate the air pockets or voids. Generally speaking, however, two on each side are deemed to be suff cient.

Rotation is imparted to the stuffing wheels incident to the travel of the finishing machine by. virtue of the fact that the stufling wheels engage the aggregate below'their axis of rotation and the resistance of the aggregate to the forward movement of the wheels causes rotation instead of a mere slicing or cutting through without rotation. 5

The rotation of the stumng wheels causes the beveled edge to penetrate the aggregate and scrape the same'from the inner face of the road forms'and guide it towards the ribs which exert a preliminary stufiing as the device is moved forward, and finally the enlarged terminals create a final downward stufling as they approach their lowermost position in their rotation. 'As

action is automatically obtained. While the specific details of construction have been herein shown anddescribed, the invention is not confined thereto as changes and alterations may be made without departing from the spirit thereof, as defined by the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: '5 ,1. In apparatus of the class described, a movable support adapted'to travel over aggregate on a roadbed, and stuffing means engageable with the aggregate, said stuffing means having a raised portion presenting a surface of substantial'width in movement of the support to stuff the aggregate adjacent the confines for the same.

2. In'apparatus of the class described; a movable support adapted to travelover aggregate on a roadbed, and rotatable stuffing means having raised portions engageable with the aggregate in movement of the support to stuff the aggregate adjacent the confines for thesame.

3, In apparatus of the class describe g adapted. to move upon road rails, a support connected to one end thereof and swingable in a horizontal plane, and an aggregate stuffing device carried by said support in position to engage the aggregate next to the rails.

6. in apparatus of the class described, a frame adapted to move upon road rails, a support connected to one end thereof, an aggregate stuffing device carried by said support in position to engage the aggregate next to the rails, and guiding means to hold the stuffing device in operative relation to the rails. v

7. An aggregate stufiing device comprising a support, and means carried by said support for stuffing aggregate comprising a disc having stuffing means on one face thereof for acting upon the aggregate.

8. An aggregate stuffing device comprising a support, and rotatable means carried by said support for stuffing aggregate comprising a disc having ribs on one face thereof for acting upon the aggregate.

9. An aggregate stuiling device comprising a support, and rotatable means carried by said support for stuffing aggregate comprising a disc having ribs on one face thereof for acting upon the aggregate, said ribs extending radially on the face of said disc.

10. An aggregate stuffing device comprising a support, and rotatable means carried by said support for stuffing aggregate comprising a disc having ribs on one face thereof for acting upon the aggregate, said ribs being arcuately shaped and extending radially on the face of said disc.

11. An aggregate stufiing device comprising a support, and means carried by saidsupport for stuiiing aggregate comprising a disc having a cutting edge, said disc having ribs on one face thereof for acting upon the aggregate.

12. An aggregate stufiing device comprising a support, and means carried by said support for stuffing aggregate comprising a disc having a cutting edge, said cutting edge being beveled on the side next the aggregate, and said disc having ribs on one face thereof for acting upon the aggregate.

13. An aggregate stufiing device comprising a rotatable disc having 'stuifing ribs on one face thereof. 1

14. An aggregate stuffing device comprising a thereof and an opposite face having arcuate radial ribs formed with enlarged terminals adjacent the outer periphery of said disc, and a beveled cutting edge around the outer periphery A 'of said disc.

7 15. An aggregate stuffing device comprising a rotatable disc having asmooth face on one side 16. In combination with a concrete road finvishing machine adapted to travel along road stuiiing device including a disc having means carried thereby for compressing, a section of the aggregates ofsubstantial-width during travel of the machine along the road forms. V

17, In combination With a concrete road finishing machine adapted to travel along road forms, a concrete stuffing attachment carried by said finishing machine and operable incident to the travel of said finishing'machine for-stuffing the concrete adjacent the road forms, said attachment including afrotatable member having means disposed thereon for compressing a section of the aggregatesof substantial width.

18. vIn combination with a concrete road finishing machine adapted to travel along. road forms, a stuffing attachment therefor comprising a support, means carried by said support for stufling the concreteadjacent the road forms, and meansfor guiding said stuffing means.

'19. In combination, a road, a support adapted to travel upon parallel road forms above fresh concrete laidtherebetween, and stufiing devices presenting substantially horizontal surfaces ,of

I substantial Width-at'the instant of contact with just adjacent to the inner sides of the road forms.

20. In apparatus of the class described, a frame adapted to move'upon rails, and an aggregate stufiingdevice having a loose'vertical pivotal con!- nection with said frame, said device being disposed in position to engage the aggregate next to the rails, whereby saiddevice is actuated by the aggregate contacting therewith as the frame is moved along the rails. a

21. In apparatus of the class described, a movable support, and aggregate stufiing means ro-' tatably mounted on said support, whereby saidmeans is operated by the aggregate contacting therewith during movement of said support, said stuffing means including a disc having raised portions on one face thereof.

22.'A machine for tamping the margins of a concrete roadwayconfined between side forms and while in plasticstate, including a framework, carrier wheels movable along said side forms, as

a track, and on which the framework is mounted, rotatable tamping discs mounted in the framework and positioned to work between the respective margins of the plastic'roadway material and ,the adjacent side forms to stuff the plastic 'ma- .terial adjacentv to the said side forms.

23. A machine for'tamping margins of a concrete roadway confined between. side forms and while in plastic state, including a framework,

means for supporting said framework for movement along the form and concrete confined thereby, and rotatably mounted tamping discs carried by the framework and positioned to work between the respective margins of theplastic road- 

